Su Wanqing notices that her mother-in-law Zhou Huilan has been unhappy since retirement, secretly signing up for a community choir but not daring to go. She teams up with Aunt Lin Qiaoyi to prepare a "neighborhood family dinner", wanting to help her mother-in-law rediscover her dream from the old songbook. Her husband Lu Zhiyuan misunderstands her for neglecting the family, and her mother-in-law also thinks she is spending money recklessly. Over three days, misunderstandings escalate step by step until the day of the family dinner, when the old songbook, choir sheet music, and neighbors' applause reveal the truth. The family learns to listen and sympathize, singing out a warm new sound in the ordinary fireworks of daily life.